Young female teacher showing a book to children in infant school class, close up, over shoulder view

indoors day four people boy girl adult young adult woman 20s millennial african american ethnicity black caucasian chinese asian ethnicity mixed race person multi-ethnic group teacher kids children pupils schoolchildren schoolgirls schoolboy classmates smiling sitting learning teaching reading holding book showing childhood education communication school classroom lesson nursery school infant school kindergarten concentrating interested attention group learning over shoulder view waist up selective focus close up slow motion handheld